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本HPLC 法系在样品注射阀的环路部位安装一根10μm 的C_(18)硅烷的短预柱作为清冼步骤,使制剂中的赋形剂保留在其中,借助另一溶剂泵泵回洗废液,再转动转换阀使所需测定的组份通过另一分析柱,并用一系列二极管UV 检测器定量检出。本法正确、精密、稳定性指示,测定时间快速无须作抽提的预处理。实验用试剂均为分析纯17-戊酸倍他米松、21-戊酸倍他米松、氢可的松、炔诺酮等对照品。HPLC 层析
This HPLC method installs a short precolumn of 10μm C 18 silane on the loop of the sample injection valve as a cleaning step to retain the excipients in the formulation and to pump back the solution through another solvent pump Waste liquid, and then turn the switch valve so that the components to be measured pass the other analytical column and quantitatively detected with a series of diode UV detectors. This law is correct, precise, stability instructions, rapid determination of time without extraction for pretreatment. Experimental reagents are analytically pure 17-valeric acid betamethasone, 21-valerate betamethasone, hydrocortisone, norethindrone and other reference substance. HPLC chromatography